One of the things I really loved about Facebook was the ability to chat. I'm really looking forward to a website were I can log into my Mastodon and a XMPP/Matrix (or whatever) client at the same time.
My time line on the right and my chats on the left.
Maybe I just need to develop this myself.
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Another thing I miss about Facebook was that most people I know IRL are on there as well. It was really easy to get in contact with someone I just met, just look him/her up and you've got a chat mate. Now I just have to chat with strangers or people I've met earlier online. Not that it is a bad thing, but just different. Still need to get used to it.
To make it easier for people that know me IRL to find me, I'm actually going to use my IRL name + profile picture on Mastodon now.